I have a '03 Cobra w/the 2.8 pulley and a couple of other mods done...but to get to the point i have alot of slippage in the 5200 to 5600 range with my bel i was told that FORD made the 100mm idler pulleys the reason i want the ford ones is because the car looks stock besides the inprint i put in the supercharger cover with my old pulley...Does anyone know the part number for the FORD 100mm idler pulley or atleast one that is black and i already looked at SFPH they had one but i was told to go with the one from FORD because it is STRONGER please help me out thanks